Fix trailing whitespace in .cpp, .h, and .idl files (ex. Source/core)

Source/modules/indexeddb/IDBEventDispatcher.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 54 matching lines @@
     //        HTML5. So after we've fired an "error" event, if .preventDefault() was
     //        never called on the event, we fire an error event on the window (can't
     //        remember if this happens before or after we abort the transaction).
     //        This is a separate event, which for example means that even if you
     //        attach a capturing "error" handler on window, you won't see any events
     //        unless an error really went unhandled. And you also can't call
     //        .preventDefault on the error event fired on the window in order to
     //        prevent the transaction from being aborted. It's purely there for
     //        error reporting and distinctly different from the event propagating to
     //        the window.
-    //        
+    //
     //        This is similar to how "error" events are handled in workers.
-    //        
+    //
     //        (I think that so far webkit hasn't implemented the window.onerror
     //        feature yet, so you probably don't want to fire the separate error
     //        event on the window until that has been implemented)." -- Jonas Sicking
 
 doneDispatching:
     event->setCurrentTarget(0);
     event->setEventPhase(0);
     return !event->defaultPrevented();
 }
 
 } // namespace WebCore